what is $\frac{2}{3}$ of 21?

Explanation:

Step1: Recall the meaning of "of" in math

"Of" means multiplication. So we need to calculate $\frac{2}{3}\times21$.

Step2: Perform the multiplication

$\frac{2}{3}\times21=\frac{2\times21}{3}=\frac{42}{3} = 14$.

Answer:

14